Magnetic material and antenna device
US7713641B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 17, 2008 |
| Grant date | May 11, 2010 |
| Priority date | — |
| Expiry date | Mar 17, 2028 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/325
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A magnetic material includes a substrate and a composite magnetic film formed on the substrate. The composite magnetic film comprises a plurality of columnar members formed on the substrate and having a longitudinal direction perpendicular to a surface of the substrate, each of the columnar members containing a magnetic metal or a magnetic alloy selected from at least one of Fe, Co, and Ni, and an inorganic insulator formed between the columnar members and selected from an oxide, a nitride, and fluoride of metal. The composite magnetic film has a minimum anisotropy magnetic field Hk1 in a surface parallel to the substrate surface and a maximum anisotropy magnetic field Hk2 in a surface parallel to the substrate surface, a ratio Hk2/Hk1 is greater than 1.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.